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Phone Directory 312-274 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-274 Chicago, IL Ameritech Illinois Cook Landline 01/25/1998

Other Series For Prefixes

312-2740###
312-2741###
312-2742###
312-2743###
312-2744###
312-2745###
312-2746###
312-2747###
312-2748###
312-2749###